Joseph Priestley, Radical Thinker is the catalogue for the exhibit that was at the Chemical Heritage Foundation from August 2004 through July 2005. The exhibit commemorated the 200th anniversary of the death of Joseph Priestley. The catalogue includes insightful essays by Marjorie Gapp, curator of art and images at CHF, and historian Robert Anderson. Gapp and Mary Ellen Bowden, with Lisa Rosner, examine the historical significance of the many objects and artifacts found in this fascinating collection.